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CVE-2026-46056

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock i…

Published May 27, 2026CWE-416EPSS 0.28%

Overview

CVE-2026-46056 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

hci_conn lookup and field access must be covered by hdev lock in

hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise

the connection can be freed concurrently.

Extend the hci_dev_lock critical section to cover all conn usage in both

handlers.

Keep the existing keypress notification behavior unchanged by routing

the early exits through a common unlock path.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47Refgit.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2Refgit.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993Refgit.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7Refgit.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903efRefgit.kernel.org/stable/c/d28311539ac9f65e29308ea219ecaa48aa5e76e5Refgit.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8Refgit.kernel.org/stable/c/ea18732d2614557e59f4c0d8cdbe6611aeab33b7

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46056?

CVE-2026-46056 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-46056?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-46056?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-46056?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46056 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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